On 2017/3/8 9:53, Kinglong Mee wrote:
> On 3/8/2017 09:11, Jaegeuk Kim wrote:
>> Hi,
>>
>> On 03/04, Kinglong Mee wrote:
>>> When the zone type is BLK_ZONE_TYPE_CONVENTIONAL, the blkstart is
>>> calculated twice.
>>>
>>> Signed-off-by: Kinglong Mee <kinglong...@gmail.com>
>>> ---
>>> fs/f2fs/segment.c | 22 +++++++++-------------
>>> 1 file changed, 9 insertions(+), 13 deletions(-)
>>>
>>> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
>>> index 4bd7a8b..ed181d1 100644
>>> --- a/fs/f2fs/segment.c
>>> +++ b/fs/f2fs/segment.c
>>> @@ -772,11 +772,6 @@ static int __f2fs_issue_discard_async(struct
>>> f2fs_sb_info *sbi,
>>>
>>> trace_f2fs_issue_discard(bdev, blkstart, blklen);
>>>
>>> - if (sbi->s_ndevs) {
>>> - int devi = f2fs_target_device_index(sbi, blkstart);
>>> -
>>> - blkstart -= FDEV(devi).start_blk;
>>> - }
>>
>> No, you can't do this, since the blkstart will be used for dc->lstart.
>> So, it needs to do like this?
>
> Sorry, I miss that.
>
> But, get_blkz_type() needs the new blkaddr for blkz_type as
> "FDEV(i).blkz_type[zno]", so that, the blkaddr must be calculated
> in front of __f2fs_issue_discard_zone, just like this?
>
>>From efd182428830898cc31d49f74d4bd2ab7455cec4 Mon Sep 17 00:00:00 2001
> From: Kinglong Mee <kinglong...@gmail.com>
> Date: Wed, 8 Mar 2017 09:49:53 +0800
> Subject: [PATCH] f2fs: fix the fault of calculating blkstart twice
>
> When the zone type is BLK_ZONE_TYPE_CONVENTIONAL, the blkstart is
> calculated twice.
>
> Signed-off-by: Kinglong Mee <kinglong...@gmail.com>
> Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
Reviewed-by: Chao Yu <yuch...@huawei.com>
Thanks,
> ---
> fs/f2fs/segment.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 401f25d..dbd2e7a 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -816,6 +816,7 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info
> *sbi,
> struct block_device *bdev, block_t blkstart, block_t blklen)
> {
> sector_t sector, nr_sects;
> + block_t lblkstart = blkstart;
> int devi = 0;
>
> if (sbi->s_ndevs) {
> @@ -833,7 +834,7 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info
> *sbi,
> case BLK_ZONE_TYPE_CONVENTIONAL:
> if (!blk_queue_discard(bdev_get_queue(bdev)))
> return 0;
> - return __f2fs_issue_discard_async(sbi, bdev, blkstart, blklen);
> + return __f2fs_issue_discard_async(sbi, bdev, lblkstart, blklen);
> case BLK_ZONE_TYPE_SEQWRITE_REQ:
> case BLK_ZONE_TYPE_SEQWRITE_PREF:
> sector = SECTOR_FROM_BLOCK(blkstart);
>
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